Casting electrodes.



RQL. WHITEHEAD.l

CASTING ELECTRODES. APPLICATIQN mfp JUNEZB, 1914.'

1,206,964. Patented Dec. 5,1916.

INVENTOR 1 WIT/VESS` 0m] R. L. WHHEHEAD.

CASTING ELECTRODAES. APPucATIoN FILED xunzzsfisvm.

1,206,964. y Patented Deo. 5,1916.v

2 SHEETS-SHEET 2.

Vage Ain the ridge or projection,

BEST AVAILABLE coP ridge or projection e is flanked at its base and along opposite sides thereof with a basal fillet n. The function of these filletsis to provide, projection and on both sides thereof, a .body of metal sufficient to prevent the more or less unequal shrinking which is liable to occur inthe contact ridge or projection in those instances where the fillets referred to are not present and where the ridge or projection springs directly from -.deereases, the cross-sectional area of the fillets increases. Thisonipensating action of the fillets does not, however, interfere with the drawing of the lug f from the mold, inasmuch as although the shrinkage inthe ridge or projection c is rendered substantially uniform by the presence of the fillets fn, suxch shrinkage, because of the liinited size of the fillets is nevertheless s iiiiicient to permit the cast ridge or projection, on cooling, to withdraw itself from contact with the walls of the recess h to the necessary degree to clear the mold and permit the stripping of the casting therefrom.

What I claim is: y 1. A mold for castinga contact ridge or projection upon the supporting lug of an electrode, said mold being provided with a lug-casting wing having inclined sides for its casting" cavity thereby facilitating the drawing of the lug, and being further y/provided with 'a recess having vertical walls and within which the contact ridge or projectionis to be -east and with supplemental fillet-forming recesses at opposite sides of the contact ridge recess, whereby on cooling of the casting with resultant shrinkage, the

'presence of the fillets ,formed by the iilletforming recesses will canse the walls of the contact ridge or projection to remain vertical. y

2. A mold for casting a contact ridge or Aprojection upon the supporting lug lot an etectrode, said mold being provided with a i lug-castingiving its casting cavity thereby having inclined sides for at'the base of the contact ridge ,or

increasing thickness, correspondfacilitating the drawing of the lng, andxbeing further provided with a recess having vertical walls and within which the contact ridge or pro jection is'tobe cast and :with supplemental fillet-forming recesses atopposite sides of the contact ridge recess, saidy supplemental fillet-forming recesses `increasing in area in cross-section frein above downwardly, whereby on 'coolingofi the casting with resultant shrinkage, the presence of the illets formed byr the fillet-forming recesses will cause the walls of the contact ridge or projection to remain vertical. f

The method of castinga substantially l .tl-.it article, such as a copper anode for use in eleetrolytio refining,` `having kits edges iIiclined relatively to the general plane'of the casting 'to facilitate "removal ofthe casting from the mold and having a contact ridge or projection thereon, the walls of which are transverse to the general plane of the casting, includingk the` castingk of'illets at op posite sides of the base of the said contact ridgeor projection, `'whereby on coolclined relatively to the general plane oi they casting to i'zicilitatcgreiiioval oi the castingy from the `niold aiidh-aviiig a contact ridge orr projection thereon, the `wallsfof wliichare transverse to the general plane of the casting, including the casting ot' lillets at opposite sides ot the base o't the said contact ridge or projection, which fillets are increased in cross-section throughout their length in correspoiidence with the inclinai tion oithe edgesioi" the casting, whereby oii cooling ot the casting with `resultant shrinkage. the presence of the` metall oi the saidy lillets will inaintaiiitlie walls oi" the ontact ridge or projection transverseto the general ilaiiiaot the casting.r

ln testiiiioi'iy whereof I aliix my signatui'e in iresence ottwol witnesses.

lVitnesses: Y

M. it. Bim., liorii-z'r (l. Biiilxic'r'r. 

